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Cleaned throttle body, now have a CEL
Posted 05 November 2005 - 09:57 PM
Posted 05 November 2005 - 10:44 PM
I'd suspect the idle air control valve.
Posted 06 November 2005 - 01:03 AM
Yeah my mechanic cleaned my throttle body to fix hesitation and low idle. Hesitation is fixed but low idle was not. CEL came on while driving home from him cleaning TB. Since then it has come on 4 times. Code was p1507 idle control malfunction (fail safe). I fixed the low idle by finding the adjustment on the IACV. CEL still comes on goes off comes on goes off comes on pisses me off. I have tried 4867395 things to fix it. Including cleaning the EGR, mass air flow sensor, and IACV. I an now thinking it has to be related the cleaning of the throttle body. Anyone have any past problems or advice? Thanks
What year and model??
Posted 08 November 2005 - 01:14 AM
Did you troubleshoot the IACV?
year 97 legacy 2.2L
Still in despirate need of help!
Maybe you need a new one?
Posted 08 November 2005 - 04:46 PM
Posted 08 November 2005 - 09:03 PM
Posted 15 November 2005 - 09:58 AM
Posted 23 November 2005 - 10:09 AM
Posted 23 November 2005 - 06:21 PM
It might not solve the problem, but it is a good start.
How are your fuel, air filter, PCV valve etc.? What do your plugs look like?
Does the idle bobble around and then die?
How is the rest of your car's performance ie. mileage, hesitation etc.?
Posted 19 December 2005 - 02:54 PM
Posted 19 December 2005 - 05:33 PM
How is the fuel filter?
What screw was adjusted before? If it was the idle screw it could the TPS out of whack possibly.
I imagine the check engine light will probably tell you where to go looking.
Posted 22 December 2005 - 01:15 PM
Posted 22 December 2005 - 03:20 PM
Posted 22 December 2005 - 03:20 PM
Only one thing really changes the throttle body from it's factory perfect condition; a small ridge of gunk/carbon buildup in the area where the throttle plate comes to rest close to the inside bore of the body itself. This clearance without a buildup of carbon is critical for proper "minimum air rate" past the closed throttle plate at idle. A few thousanths of an inch of carbon will begin to affect idle performance.
Take this for what it's worth, but never spray any cleaner into the throttle body. Never adjust any screws on the throttle body. If you can open the throttle plate and feel a tiny ridge of carbon where the throttle plate comes to rest, simply rub it away with a clean, dry cloth wrapped around your forefinger.
That's all you need to do.
The adjustments to the throttle body are sensitive down to a few 1/1000ths
of and inch. The throttle position sensor can be damaged by cleaners. The IAC motor is also sensitive to cleaners. Your "mechanic" may have also left a vacuum hose off somewhere.
Posted 28 December 2005 - 11:00 PM
Still lookin for a solutions for the low idle. Thanks for the feedback.
Posted 30 December 2005 - 05:56 AM
Posted 30 December 2005 - 11:15 AM
If you query the CPU for clues then learn how to measure for requisite operating parameters (voltage, current, resistance, etc.), you'll save money and keep your car on the road.
If you twist on adjustments and replace parts blindly, your gonna throw money down the drain and horse-up the system beyond what a normal mechanic can put straight, especially if you can't describe to him exactly what you've done to it.
Mechanics hate working on stuff that the customer "worked-on" first, because it tends to mess-up the natural order of how things fail. I understand that the person you took it to initiated the CEL, but his cleaning may have merely unmasked a latent problem that was already there. What you're doing is making it worse ...much worse.
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